WO2020072213A1 - Techniques de détermination de paramètres de signal de référence de sondage - Google Patents

Techniques de détermination de paramètres de signal de référence de sondage

Info

Publication number
WO2020072213A1
WO2020072213A1 PCT/US2019/052229 US2019052229W WO2020072213A1 WO 2020072213 A1 WO2020072213 A1 WO 2020072213A1 US 2019052229 W US2019052229 W US 2019052229W WO 2020072213 A1 WO2020072213 A1 WO 2020072213A1
Authority
WO
WIPO (PCT)
Prior art keywords
srs
resource set
srs resource
transmission
prioritization
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2019/052229
Other languages
English (en)
Inventor
Alexandros MANOLAKOS
Sony Akkarakaran
Amir Aminzadeh Gohari
June Namgoong
Joseph Binamira SORIAGA
Peter Gaal
Tingfang Ji
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qualcomm Inc
Original Assignee
Qualcomm Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Priority to CN201980064255.5A priority Critical patent/CN112771812B/zh
Priority to EP19782850.2A priority patent/EP3861660B1/fr
Publication of WO2020072213A1 publication Critical patent/WO2020072213A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H04L25/0226—Channel estimation using sounding signals sounding signals per se
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/0064—Rate requirement of the data, e.g. scalable bandwidth, data priority
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/242—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account path loss
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0632—Channel quality parameters, e.g. channel quality indicator [CQI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H04L25/0228—Channel estimation using sounding signals with direct estimation from sounding signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/146—Uplink power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/30—Transmission power control [TPC] using constraints in the total amount of available transmission power
    • H04W52/32—TPC of broadcast or control channels
    • H04W52/325—Power control of control or pilot channels

Definitions

  • a wireless multiple-access communications system may include a number of base stations or network access nodes, each simultaneously supporting communication for multiple communication devices, which may be otherwise known as user equipment (UE).
  • UE user equipment
  • the instructions may be executable by the processor to cause the apparatus to receive configuration information for at least a first SRS resource set and a second SRS resource set, the first SRS resource set and the second SRS resource set each including two or more parameters for an associated SRS transmission, determine that the first SRS resource set and the second SRS resource set correspond to a same transmission resource, select the first SRS resource set for a first SRS communication using the transmission resource based on a prioritization associated with each of the first SRS resource set and the second SRS resource set, and transmit the first SRS communication based on one or more SRS transmission parameters associated with the first SRS resource set.
  • the apparatus may include means for receiving configuration information for at least a first SRS resource set and a second SRS resource set, the first SRS resource set and the second SRS resource set each including two or more parameters for an associated SRS transmission, determining that the first SRS resource set and the second SRS resource set correspond to a same transmission resource, selecting the first SRS resource set for a first SRS
  • the code may include instructions executable by a processor to receive configuration information for at least a first SRS resource set and a second SRS resource set, the first SRS resource set and the second SRS resource set each including two or more parameters for an associated SRS transmission, determine that the first SRS resource set and the second SRS resource set correspond to a same transmission resource, select the first SRS resource set for a first SRS communication using the transmission resource based on a prioritization associated with each of the first SRS resource set and the second SRS resource set, and transmit the first SRS communication based on one or more SRS transmission parameters associated with the first SRS resource set.
  • the prioritization may be a random prioritization. In some examples of the method, apparatuses, and non-transitory computer-readable medium described herein, the prioritization provides for alternating between the first SRS resource set and the second SRS resource set in consecutive SRS transmissions that may be associated with both the first SRS resource set and the second SRS resource set.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining that the first SRS resource set and the second SRS resource set are each associated with a single antenna port, and where the first SRS communication is transmitted based on one or more SRS transmission parameters associated with both the first SRS resource set and the second SRS resource set.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining that the first SRS resource set and the second SRS resource set each have a same periodicity and transmitting the first SRS communication further based on one or more SRS transmission parameters associated with both the first SRS resource set and the second SRS resource set.
  • the two or more parameters of each SRS resource set include one or more of a resource type associated with the SRS resource set or power control parameters associated with the SRS resource set.
  • the resource type indicates a periodic SRS configuration, a semi -persistent SRS configuration, or an aperiodic SRS configuration.
  • the power control parameters indicate one or more of a pathloss reference signal, an initial transmission power for the associated SRS transmissions, or a power control adjustment state for the associated SRS transmissions.
  • the transmission resource may be determined based on a symbol identification within a transmission slot and a transmission slot index and periodicity for semi-persistent or periodic SRS transmissions, or a trigger that initiates an aperiodic SRS transmission.
  • a method of wireless communication at a base station may include transmitting configuration information to a UE for at least a first SRS resource set and a second SRS resource set, the first SRS resource set and the second SRS resource set each including two or more parameters for an associated SRS transmission, identifying that the first SRS resource set and the second SRS resource set correspond to a same transmission resource, determining that the first SRS resource set is associated with the transmission resource based on a prioritization associated with each of the first SRS resource set and the second SRS resource set, and measuring one or more channel characteristics of a SRS transmission received from the UE on the transmission resource based on one or more SRS transmission parameters associated with the first SRS resource set.
  • a non-transitory computer-readable medium storing code for wireless
  • the prioritization may be based on one or more of a resource set identification value of each of the first SRS resource set and the second SRS resource set, a configured resource set identification priority; or a priority based on a usage parameter of each of the first SRS resource set and the second SRS resource set.
  • the prioritization may be a random prioritization and the determining may be further based on the one or more measured channel characteristics.
  • the prioritization provides for alternating between the first SRS resource set and the second SRS resource set in consecutive SRS transmissions that may be associated with both the first SRS resource set and the second SRS resource set.
  • the configuration information further includes one or more of a priority associated with each SRS resource set, or one or more combinations of parameters that indicate that a same SRS transmission may be used for both the first SRS resource set and the second SRS resource set.
  • Some examples of the method, apparatuses, and non-transitory computer-readable medium described herein may further include operations, features, means, or instructions for determining that the first SRS resource set and the second SRS resource set are each associated with a single antenna port, and where the SRS transmission are further measured based on one or more SRS transmission parameters associated with both the first SRS resource set and the second SRS resource set.
  • the two or more parameters of each SRS resource set include one or more of a resource type associated with the SRS resource set or power control parameters associated with the SRS resource set.
  • the resource type indicates a periodic SRS configuration, a semi -persistent SRS configuration, or an aperiodic SRS configuration.
  • the power control parameters indicate one or more of a pathloss reference signal, an initial transmission power for the associated SRS transmissions, or a power control adjustment state for the associated SRS transmissions.
  • the transmission resource may be determined based on a symbol identification within a transmission slot and a transmission slot index and periodicity for semi-persistent or periodic SRS transmissions, or a trigger that initiates an aperiodic SRS transmission.
  • the first SRS resource set and the second SRS resource set include an associated usage parameter that indicates an uplink codebook-based channel quality determination, an uplink non-codebook precoding determination; an uplink analog beamforming determination, or an antenna switching procedure at the UE.
  • FIG. 1 illustrates an example of a system for wireless communications that supports sounding reference signal (SRS) parameter determination techniques in accordance with aspects of the present disclosure.
  • SRS sounding reference signal
  • FIG. 2 illustrates an example of a portion of a wireless communications system that supports SRS parameter determination techniques in accordance with aspects of the present disclosure.
  • FIG. 3 illustrates an example of SRS resource sets and associated SRS resources that support SRS parameter determination techniques in accordance with aspects of the present disclosure.
  • FIG. 4 illustrates an example of a process flow that supports SRS parameter determination techniques in accordance with aspects of the present disclosure.
  • FIGs. 5 and 6 show block diagrams of devices that support SRS parameter determination techniques in accordance with aspects of the present disclosure.
  • FIG. 7 shows a block diagram of a communications manager that supports SRS parameter determination techniques in accordance with aspects of the present disclosure.
  • FIG. 8 shows a diagram of a system including a device that supports SRS parameter determination techniques in accordance with aspects of the present disclosure.
  • FIGs. 9 and 10 show block diagrams of devices that support SRS parameter determination techniques in accordance with aspects of the present disclosure.
  • FIG. 11 shows a block diagram of a communications manager that supports SRS parameter determination techniques in accordance with aspects of the present disclosure.
  • FIG. 12 shows a diagram of a system including a device that supports SRS parameter determination techniques in accordance with aspects of the present disclosure.
  • FIGs. 13 through 15 show flowcharts illustrating methods that support SRS parameter determination techniques in accordance with aspects of the present disclosure.
  • a user equipment may be configured with multiple SRS resource sets that are used to determine parameters for associated SRS transmissions.
  • Each SRS resource set may be associated with a different use case for the SRS, which may include an uplink codebook-based SRS, uplink non-codebook SRS for determining precoding, analog beamforming SRS, and antenna switching SRS.
  • two or more of the SRS resource sets configured at a TIE may be mapped to a same SRS transmission resource (e.g., a same antenna port during an orthogonal frequency division multiplexing (OFDM) symbol that is allocated for SRS transmission).
  • OFDM orthogonal frequency division multiplexing
  • one or more parameters of the two or more SRS resource sets may be different (e.g., different SRS resource sets may have different precoding or antenna virtualization).
  • Techniques such as discussed herein provide for determination of which of the two or more SRS resource sets may be selected for an SRS transmission via the SRS transmission resource (e.g., defined in Radio Resource Control (RRC) or in location positioning protocol (LPP)).
  • RRC Radio Resource Control
  • LPP location positioning protocol
  • a prioritization is used to determine which of the two or more SRS resource sets are to be used for a SRS transmission. Such a prioritization may be based on an identification associated with each SRS resource set, a specified prioritization, a configured prioritization, a randomized prioritization, a round-robin prioritization, or combinations thereof.
  • a UE may apply multiple SRS resource sets to a single SRS transmission based at least in part on one or more allowed combinations of SRS resource sets that may use a same SRS transmission resource.
  • a first combination of SRS resource sets for uplink codebook and antenna switching use cases may be allowed to use a same SRS transmission resource
  • a second combination of SRS resource sets for non codebook precoding and antenna switching use cases may not be allowed to use a same SRS transmission resource.
  • Such allowable combinations may be determined, in some cases, based at least in part on a usage parameter that indicates the use case of the SRS resource sets.
  • one or more use case combinations of SRS resource sets that may use a same SRS transmission resource may be allowed based on UE capability.
  • prioritization of SRS resource sets may be based on a number of antenna ports associated with the SRS resource sets. For example, if a SRS resource (e.g., configured through LPP) in two SRS resource sets is a single antenna port resource the UE may transmit a joint SRS for both SRS resource sets, but if one of the SRS resource sets has two or more antenna ports the UE may prioritize between the SRS resource sets.
  • a SRS resource e.g., configured through LPP
  • the UE may transmit a SRS according to both of the two SRS resource sets, and if the two SRS resource sets are aperiodic the UE may select one of the two SRS resource sets according to a prioritization associated with the two SRS resource sets.
  • the described techniques may support improvements in selecting between the SRS resource sets, with a shared transmission resource, based at least in part on a prioritization. These techniques may increase reliability and reduce latency, decreasing signaling overhead, and improving reliability, among other advantages. As such, supported techniques may include improved network operations and, in some examples, may promote network efficiencies, among other benefits.
  • FIG. 1 illustrates an example of a wireless communications system 100 that supports SRS parameter determination techniques in accordance with aspects of the present disclosure.
  • the wireless communications system 100 includes base stations 105, UEs 115, and a core network 130.
  • the wireless communications system 100 may be a Long Term Evolution (LTE) network, an LTE-Advanced (LTE-A) network, an LTE-A Pro network, or a New Radio (NR) network.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • LTE-A Pro LTE-A Pro
  • NR New Radio
  • wireless communications system 100 may support enhanced broadband communications, ultra-reliable (e.g., mission critical) communications, low latency communications, or communications with low-cost and low- complexity devices.
  • multiple SRS resource sets may be configured at a LIE 115 that use a same SRS transmission resource, and the UE 115 may determine SRS parameters for an SRS transmission using the SRS transmission resource according to techniques discussed herein.
  • Base stations 105 may wirelessly communicate with UEs 115 via one or more base station antennas.
  • Base stations 105 described herein may include or may be referred to by those skilled in the art as a base transceiver station, a radio base station, an access point, a radio transceiver, a NodeB, an eNodeB (eNB), a next-generation Node B or giga-nodeB (either of which may be referred to as a gNB), a Home NodeB, a Home eNodeB, or some other suitable terminology.
  • Wireless communications system 100 may include base stations 105 of different types (e.g., macro or small cell base stations).
  • the UEs 115 described herein may be able to communicate with various types of base stations 105 and network equipment including macro eNBs, small cell eNBs, gNBs, relay base stations, and the like.
  • Each base station 105 may be associated with a particular geographic coverage area 110 in which communications with various UEs 115 is supported. Each base station 105 may provide communication coverage for a respective geographic coverage area 110 via communication links 125, and communication links 125 between a base station 105 and a UE 115 may utilize one or more carriers. Communication links 125 shown in wireless communications system 100 may include uplink transmissions from a UE 115 to a base station 105, or downlink transmissions from a base station 105 to a UE 115. Downlink transmissions may also be called forward link transmissions while uplink transmissions may also be called reverse link transmissions.
  • the geographic coverage area 110 for a base station 105 may be divided into sectors making up a portion of the geographic coverage area 110, and each sector may be associated with a cell.
  • each base station 105 may provide communication coverage for a macro cell, a small cell, a hot spot, or other types of cells, or various combinations thereof.
  • a base station 105 may be movable and therefore provide communication coverage for a moving geographic coverage area 110.
  • different geographic coverage areas 110 associated with different technologies may overlap, and overlapping geographic coverage areas 110 associated with different technologies may be supported by the same base station 105 or by different base stations 105.
  • the wireless communications system 100 may include, for example, a heterogeneous LTE/LTE-A/LTE-A Pro or NR network in which different types of base stations 105 provide coverage for various geographic coverage areas 110.
  • the term“cell” refers to a logical communication entity used for communication with a base station 105 (e.g., over a carrier), and may be associated with an identifier for distinguishing neighboring cells (e.g., a physical cell identifier (PCID), a virtual cell identifier (VCID)) operating via the same or a different carrier.
  • a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., machine-type communication (MTC), narrowband Internet-of-Things (NB-IoT), enhanced mobile broadband (eMBB), or others) that may provide access for different types of devices.
  • MTC machine-type communication
  • NB-IoT narrowband Internet-of-Things
  • eMBB enhanced mobile broadband
  • the term“cell” may refer to a portion of a geographic coverage area 110 (e.g., a sector) over which the logical entity operates.
  • UEs 115 may be dispersed throughout the wireless communications system 100, and each UE 115 may be stationary or mobile.
  • a UE 115 may also be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable terminology, where the“device” may also be referred to as a unit, a station, a terminal, or a client.
  • a UE 115 may also be a personal electronic device such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, or a personal computer.
  • PDA personal digital assistant
  • a UE 115 may also refer to a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or an MTC device, or the like, which may be implemented in various articles such as appliances, vehicles, meters, or the like.
  • WLL wireless local loop
  • IoT Internet of Things
  • IoE Internet of Everything
  • MTC massive machine type communications
  • Some UEs 115 may be low cost or low complexity devices, and may provide for automated communication between machines (e.g., via
  • M2M communication may refer to data communication technologies that allow devices to communicate with one another or a base station 105 without human intervention.
  • M2M communication or MTC may include communications from devices that integrate sensors or meters to measure or capture information and relay that information to a central server or application program that can make use of the information or present the information to humans interacting with the program or application.
  • Some UEs 115 may be designed to collect information or enable automated behavior of machines. Examples of applications for MTC devices include smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wildlife monitoring, weather and geological event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction-based business charging.
  • Base stations 105 may communicate with the core network 130 and with one another.
  • base stations 105 may interface with the core network 130 through backhaul links 132 (e.g., via an Sl, N2, N3, or other interface).
  • backhaul links 132 e.g., via an Sl, N2, N3, or other interface.
  • Base stations 105 may communicate with one another over backhaul links 134 (e.g., via an X2, Xn, or other interface) either directly (e.g., directly between base stations 105) or indirectly (e.g., via core network 130).
  • the core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions.
  • the core network 130 may be an evolved packet core (EPC), which may include at least one mobility management entity (MME), at least one serving gateway (S-GW), and at least one Packet Data Network (PDN) gateway (P-GW).
  • the MME may manage non-access stratum (e.g., control plane) functions such as mobility, authentication, and bearer management for UEs 115 served by base stations 105 associated with the EPC.
  • User IP packets may be transferred through the S-GW, which itself may be connected to the P-GW.
  • the P-GW may provide IP address allocation as well as other functions.
  • the P-GW may be connected to the network operators IP services.
  • the operators IP services may include access to the Internet, Intranet(s), an IP Multimedia Subsystem (IMS), or a Packet-Switched (PS) Streaming Service.
  • IMS IP Multimedia Subsystem
  • At least some of the network devices may include subcomponents such as an access network entity, which may be an example of an access node controller (ANC).
  • Each access network entity may communicate with UEs 115 through a number of other access network transmission entities, which may be referred to as a radio head, a smart radio head, or a transmission/reception point (TRP).
  • TRP transmission/reception point
  • various functions of each access network entity or base station 105 may be distributed across various network devices (e.g., radio heads and access network controllers) or consolidated into a single network device (e.g., a base station 105).
  • Wireless communications system 100 may operate using one or more frequency bands, (e.g., in the range of 300 MHz to 300 GHz).
  • UHF ultra-high frequency
  • the region from 300 MHz to 3 GHz is known as the ultra-high frequency (UHF) region or decimeter band, since the wavelengths range from approximately one decimeter to one meter in length.
  • UHF waves may be blocked or redirected by buildings and environmental features. However, the waves may penetrate structures sufficiently for a macro cell to provide service to UEs 115 located indoors. Transmission of UHF waves may be associated with smaller antennas and shorter range (e.g., less than 100 km) compared to transmission using the smaller frequencies and longer waves of the high frequency (HF) or very high frequency (VHF) portion of the spectrum below 300 MHz.
  • HF high frequency
  • VHF very high frequency
  • Wireless communications system 100 may also operate in a super high frequency (SHF) region using frequency bands from 3 GHz to 30 GHz, also known as the centimeter band.
  • SHF region includes bands such as the 5 GHz industrial, scientific, and medical (ISM) bands, which may be used opportunistically by devices that can tolerate interference from other users.
  • Wireless communications system 100 may also operate in an extremely high frequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz), also known as the millimeter band.
  • EHF extremely high frequency
  • wireless communications system 100 may support millimeter wave (mmW) communications between UEs 115 and base stations 105, and EHF antennas of the respective devices may be even smaller and more closely spaced than EIHF antennas.
  • mmW millimeter wave
  • this may facilitate use of antenna arrays within a UE 115.
  • the propagation of EHF transmissions may be subject to even greater atmospheric attenuation and shorter range than SHF or EIHF transmissions. Techniques disclosed herein may be employed across transmissions that use one or more different frequency regions, and designated use of bands across these frequency regions may differ by country or regulating body.
  • wireless communications system 100 may utilize both licensed and unlicensed radio frequency spectrum bands.
  • wireless communications system 100 may employ License Assisted Access (LAA), LTE-Unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed band such as the 5 GHz ISM band.
  • LAA License Assisted Access
  • LTE-U LTE-Unlicensed
  • NR NR technology
  • an unlicensed band such as the 5 GHz ISM band.
  • wireless devices such as base stations 105 and LIEs 115 may employ listen-before-talk (LBT) procedures to ensure a frequency channel is clear before transmitting data.
  • LBT listen-before-talk
  • operations in unlicensed bands may be based on a CA configuration in conjunction with CCs operating in a licensed band (e.g., LAA).
  • Operations in unlicensed spectrum may include downlink transmissions, uplink transmissions, peer-to-peer transmissions, or a combination of these.
  • Duplexing in unlicensed spectrum may be based on frequency division duplexing (FDD), time division duplexing (TDD), or a combination of both.
  • FDD frequency division duplexing
  • TDD time division duplexing
  • base station 105 or UE 115 may be equipped with multiple antennas, which may be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming.
  • wireless communications system 100 may use a transmission scheme between a transmitting device (e.g., a base station 105) and a receiving device (e.g., a UE 115), where the transmitting device is equipped with multiple antennas and the receiving devices are equipped with one or more antennas.
  • MIMO communications may employ multipath signal propagation to increase the spectral efficiency by transmitting or receiving multiple signals via different spatial layers, which may be referred to as spatial multiplexing.
  • the multiple signals may, for example, be transmitted by the transmitting device via different antennas or different combinations of antennas. Likewise, the multiple signals may be received by the receiving device via different antennas or different combinations of antennas.
  • Each of the multiple signals may be referred to as a separate spatial stream, and may carry bits associated with the same data stream (e.g., the same codeword) or different data streams.
  • Different spatial layers may be associated with different antenna ports used for channel measurement and reporting.
  • MIMO techniques include single-user MIMO (SU-MIMO) where multiple spatial layers are transmitted to the same receiving device, and multiple-user MIMO (MU- MIMO) where multiple spatial layers are transmitted to multiple devices.
  • SU-MIMO single-user MIMO
  • MU- MIMO multiple-user MIMO
  • Beamforming which may also be referred to as spatial filtering, directional transmission, or directional reception, is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., a base station 105 or a UE 115) to shape or steer an antenna beam (e.g., a transmit beam or receive beam) along a spatial path between the transmitting device and the receiving device.
  • Beamforming may be achieved by combining the signals communicated via antenna elements of an antenna array such that signals propagating at particular orientations with respect to an antenna array experience constructive interference while others experience destructive interference.
  • the adjustment of signals communicated via the antenna elements may include a transmitting device or a receiving device applying amplitude and phase offsets to signals carried via each of the antenna elements associated with the device.
  • the adjustments associated with each of the antenna elements may be defined by a beamforming weight set associated with a particular orientation (e.g., with respect to the antenna array of the transmitting device or receiving device, or with respect to some other orientation).
  • the antennas of a base station 105 or LTE 115 may be located within one or more antenna arrays, which may support MIMO operations, or transmit or receive beamforming.
  • one or more base station antennas or antenna arrays may be co- located at an antenna assembly, such as an antenna tower.
  • antennas or antenna arrays associated with a base station 105 may be located in diverse geographic locations.
  • a base station 105 may have an antenna array with a number of rows and columns of antenna ports that the base station 105 may use to support beamforming of communications with a UE 115.
  • a UE 115 may have one or more antenna arrays that may support various MIMO or beamforming operations.
  • wireless communications system 100 may be a packet-based network that operate according to a layered protocol stack.
  • PDCP Packet Data Convergence Protocol
  • a Radio Link Control (RLC) layer may in some cases perform packet segmentation and reassembly to communicate over logical channels.
  • RLC Radio Link Control
  • a Medium Access Control (MAC) layer may perform priority handling and multiplexing of logical channels into transport channels.
  • the MAC layer may also use hybrid automatic repeat request (HARQ) to provide retransmission at the MAC layer to improve link efficiency.
  • HARQ hybrid automatic repeat request
  • the RRC protocol layer may provide establishment, configuration, and maintenance of an RRC connection between a UE 115 and a base station 105 or core network 130 supporting radio bearers for user plane data.
  • transport channels may be mapped to physical channels.
  • the radio frames may be identified by a system frame number (SFN) ranging from 0 to 1023.
  • SFN system frame number
  • Each frame may include 10 subframes numbered from 0 to 9, and each subframe may have a duration of 1 ms.
  • a subframe may be further divided into 2 slots each having a duration of 0.5 ms, and each slot may contain 6 or 7 modulation symbol periods (e.g., depending on the length of the cyclic prefix prepended to each symbol period). Excluding the cyclic prefix, each symbol period may contain 2048 sampling periods.
  • a subframe may be the smallest scheduling unit of the wireless communications system 100, and may be referred to as a transmission time interval (TTI).
  • TTI transmission time interval
  • a smallest scheduling unit of the wireless communications system 100 may be shorter than a subframe or may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs) or in selected component carriers using sTTIs).
  • a slot may further be divided into multiple mini-slots containing one or more symbols.
  • a symbol of a mini slot or a mini-slot may be the smallest unit of scheduling.
  • Each symbol may vary in duration depending on the subcarrier spacing or frequency band of operation, for example.
  • some wireless communications systems may implement slot aggregation in which multiple slots or mini-slots are aggregated together and used for communication between a UE 115 and a base station 105.
  • carrier refers to a set of radio frequency spectrum resources having a defined physical layer structure for supporting communications over a communication link 125.
  • a carrier of a communication link 125 may include a portion of a radio frequency spectrum band that is operated according to physical layer channels for a given radio access technology. Each physical layer channel may carry user data, control information, or other signaling.
  • a carrier may be associated with a pre-defmed frequency channel (e.g., an E-UTRA absolute radio frequency channel number (EARFCN)), and may be positioned according to a channel raster for discovery by EEs 115.
  • Carriers may be downlink or uplink (e.g., in an FDD mode), or be configured to carry downlink and uplink
  • signal waveforms transmitted over a carrier may be made up of multiple sub-carriers (e.g., using multi-carrier modulation (MCM) techniques such as OFDM or DFT-s-OFDM).
  • MCM multi-carrier modulation
  • the organizational structure of the carriers may be different for different radio access technologies (e.g., LTE, LTE-A, LTE-A Pro, NR, etc.). For example, communications over a carrier may be organized according to TTIs or slots, each of which may include user data as well as control information or signaling to support decoding the user data.
  • a carrier may also include dedicated acquisition signaling (e.g., synchronization signals or system information, etc.) and control signaling that coordinates operation for the carrier.
  • acquisition signaling e.g., synchronization signals or system information, etc.
  • control signaling that coordinates operation for the carrier.
  • a carrier may also have acquisition signaling or control signaling that coordinates operations for other carriers.
  • Physical channels may be multiplexed on a carrier according to various techniques.
  • a physical control channel and a physical data channel may be multiplexed on a downlink carrier, for example, using time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques.
  • control information transmitted in a physical control channel may be distributed between different control regions in a cascaded manner (e.g., between a common control region or common search space and one or more EE-specific control regions or EE- specific search spaces).
  • a carrier may be associated with a particular bandwidth of the radio frequency spectrum, and in some examples the carrier bandwidth may be referred to as a“system bandwidth” of the carrier or the wireless communications system 100.
  • the carrier bandwidth may be one of a number of predetermined bandwidths for carriers of a particular radio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 MHz).
  • each served UE 115 may be configured for operating over portions or all of the carrier bandwidth.
  • some UEs 115 may be configured for operation using a narrowband protocol type that is associated with a predefined portion or range (e.g., set of subcarriers or RBs) within a carrier (e.g.,“in-band” deployment of a narrowband protocol type).
  • a resource element may include of one symbol period (e.g., a duration of one modulation symbol) and one subcarrier, where the symbol period and subcarrier spacing are inversely related.
  • the number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme).
  • the more resource elements that a UE 115 receives and the higher the order of the modulation scheme the higher the data rate may be for the UE 115.
  • a wireless communications resource may refer to a combination of a radio frequency spectrum resource, a time resource, and a spatial resource (e.g., spatial layers), and the use of multiple spatial layers may further increase the data rate for communications with a UE 115.
  • a spatial resource e.g., spatial layers
  • Devices of the wireless communications system 100 may have a hardware configuration that supports communications over a particular carrier bandwidth, or may be configurable to support communications over one of a set of carrier bandwidths.
  • the wireless communications system 100 may include base stations 105 and/or UEs 115 that can support simultaneous communications via carriers associated with more than one different carrier bandwidth.
  • a base station 105 may configure a UE 115 with multiple SRS resource sets for SRS transmissions that may be used by the base station 105 to evaluate uplink channel quality and uplink timing for different use cases.
  • two or more of the SRS resource sets may be configured for a same SRS transmission resource, and the UE 115 may select one SRS resource set for a SRS transmission based on a prioritization of different SRS resource sets.
  • different SRS resource sets may be associated with different SRS usage parameters that indicate different use cases for the SRS, and the UE 115 may transmit a joint SRS for two or more SRS resource sets for predetermined combinations of SRS usage parameters.
  • the base station 105 may receive the SRS transmission, measure one or more channel parameters of the SRS and determine one or more settings for subsequent communications with the UE 115.
  • FIG. 2 illustrates an example of a wireless communications system 200 that supports SRS parameter determination techniques in accordance with aspects of the present disclosure.
  • wireless communications system 200 may implement aspects of wireless communications system 100.
  • wireless communications system 200 includes UE 1 l5-a and base station l05-a, which may be respective examples of a UE 115 and a base station 105 as described herein.
  • UE 1 l5-a and base station l05-a may communicate via a communication link 205.
  • the communication link 205 may be configured for uplink and downlink transmissions.
  • base station l05-a may allocate one or more resource blocks to the UE 1 l5-a from a system bandwidth for an uplink or downlink transmission.
  • the system bandwidth may be divided into a set of resource blocks that may be allocated for uplink and/or downlink transmission.
  • Base station l05-a may determine a resource block allocation 210 for UE 1 l5-a, and may configure resources for SRS transmissions.
  • SRS resources may span 1, 2, or 4 adjacent symbols with up to 4 antenna ports per SRS resource. All ports of an SRS resource may be sounded in each symbol.
  • SRS resources may be configured for aperiodic (DCI-signaled) SRS transmissions, semi -persistent SRS transmissions, or periodic SRS transmissions. Further, SRS transmissions may be wideband or subband transmissions within resource block allocation 210, and in some cases SRS bandwidth may be multiples of four PRBs.
  • the base station l05-a may configure multiple SRS resource sets that may be associated with different use cases for the SRS. Such use cases may be indicated by a usage parameter, and may include, for example, uplink codebook SRS, uplink non codebook SRS for determining precoding, analog beamforming SRS, and antenna switching SRS. Each group of SRS resources with a specific use case may be referred to as a SRS resource set. In some cases, each SRS resource set may have a resource type parameter that indicates whether the resource type is periodic, semi-persistent, or aperiodic.
  • Each SRS resource set may also include power control parameters, which may provide a pathloss reference signal (e.g., pathlossReferenceRS), an initial power (e.g., pO), and a power control adjustment (e.g., srs-PowerControlAdjustmentStates), which may be used to determine SRS transmission power.
  • pathlossReferenceRS pathlossReferenceRS
  • initial power e.g., pO
  • a power control adjustment e.g., srs-PowerControlAdjustmentStates
  • Each SRS resource set may have transmission resource parameters, that may indicate a symbol in a slot, slot-index, and periodicity in cases of periodic or semi- persistent resource types.
  • two or more of the SRS resource sets configured at a EGE may be mapped to a same SRS transmission resource (e.g., a same antenna port during an orthogonal frequency division multiplexing (OFDM) symbol that is allocated for SRS transmission).
  • a first SRS resource set and a second SRS resource set may be mapped to a first SRS resource 215, and a third SRS resource set may be mapped to a second SRS resource 220.
  • one or more parameters of the first SRS resource set and the second SRS resource set may be different (e.g., different SRS resource sets may have different precoding or antenna virtualization).
  • Data transmissions 225 may be allocated to other resources of resource block allocation 210, in this example.
  • a prioritization is used to determine which of the first SRS resource set of the second SRS resource set is to be used for the first SRS resource 215.
  • a prioritization may be based on, for example, a use case associated with each SRS resource set, a SRS resource set identification (e.g., based on high-to-low or low-to-high identification values), a specified prioritization, a configured prioritization (e.g., configured via radio resource control (RRC) signaling), a randomized prioritization, a round-robin prioritization, or combinations thereof.
  • RRC radio resource control
  • the EGE 1 l5-a may apply SRS parameters of both the first SRS resource set and the second SRS resource set to the first SRS resource 215 based at least in part on one or more allowed combinations of SRS use cases that may use a same SRS transmission resource. For example, a first combination of SRS resource sets for uplink codebook and antenna switching use cases may be allowed to use a same SRS transmission resource, and a second combination of SRS resource sets for non-codebook precoding and antenna switching use cases may not be allowed to use a same SRS transmission resource. Such allowable combinations may be determined, in some cases, based at least in part on a usage parameter that indicates the use case of the SRS resource sets. In some cases, one or more use case combinations of SRS resource sets that may use a same SRS transmission resource may be allowed based on UE 1 l5-a capability.
  • prioritization of SRS resource sets may be based on a number of antenna ports associated with the SRS resource sets. For example, if both the first SRS resource set and the second SRS resource set have a single antenna port resource, the UE 1 l5-a may transmit a joint SRS using first SRS resource 215 for both SRS resource sets. However, if one of the first or second SRS resource sets has two or more antenna ports, the UE may prioritize between the SRS resource sets.
  • the SRS resource sets may be configured as periodic SRS resource sets. In such cases, if the first SRS resource set and the second SRS resource set have a same periodicity the UE 1 l5-a may transmit via the first SRS resource 215 according to both of the first and second SRS resource sets.
  • the base station l05-a may use RRC signaling to indicate to the UE 1 l5-a prioritizations or allowed combinations of SRS resource sets that the UE 1 l5-a may use for determining SRS parameters.
  • prioritizations or allowed combinations of SRS resource sets may be specified in a wireless communications standard.
  • FIG. 3 illustrates an example of SRS resource sets and associated SRS resources 300 that support SRS parameter determination techniques in accordance with aspects of the present disclosure.
  • SRS resource sets and associated SRS resources 300 may implement aspects of wireless communications system 100 or 200. As discussed herein, different SRS resource sets may be mapped to the same or different SRS resources.
  • a first SRS resource set 305 may be associated with uplink codebook SRS transmissions that a base station may use to evaluate codebook-based transmissions.
  • a second SRS resource set 315 may be associated with antenna switching, which may be used to determine downlink precoding to be applied to channel state information reference signal (CSI-RS) transmissions.
  • the first SRS resource set 305 and the second SRS resource set 315 may each include a first SRS transmission resource 310.
  • a third SRS resource set 320 may be associated with uplink non codebook transmissions which may be used to determine precoding for non-codebook transmissions, and the third SRS resource set 320 may be mapped to a second SRS transmission resource 325.
  • a fourth SRS resource set 330 may be associated with a beamforming use case and may be used to evaluate beamforming parameters for use in beam management, and the fourth SRS resource set 330 may be mapped to a third SRS
  • transmission resource 335 is provided for purposes of discussion and illustration only, and different SRS resource sets may be associated with the same or different SRS transmission resources.
  • first SRS resource set 305 and second SRS resource set 315 that have first SRS transmission resource 310 (e.g., a first precoding or antenna port in a first SRS symbol)
  • first SRS transmission resource 310 e.g., a first precoding or antenna port in a first SRS symbol
  • techniques provided herein allow for the UE to determine parameters to use for the SRS transmission using the first SRS transmission resource 310.
  • the UE may determine SRS parameters based on a prioritization of the use-cases associated with the SRS resource sets. Such a prioritization may be a fixed prioritization that is based on a SRS resource set ID, for example.
  • the ports of the first SRS transmission resource 310 may be precoded such that the UE uses parameters of the smallest SRS resource set ID (or largest SRS resource set ID), a configured SRS resource set ID (e.g., a SRS resource set ID indicated in RRC signaling), or a specified prioritization.
  • a specified prioritization may be, for example, an ordering of use cases such as codebook, then non-codebook, then antenna switching, then beamforming.
  • the prioritization may be fixed according to a specification. In other cases, the prioritization may be configurable (e.g., via RRC signaling, a system information
  • transmission e.g., SSB, RMSI, etc.
  • UE-specific signaling e.g., SSB, RMSI, etc.
  • high layer signaling e.g., LPP
  • prioritization of the SRS resource sets may be a randomized prioritization.
  • the UE may transmit the SRS ports according to the use case of the SRS resource set ID with a round robin fashion across all SRS resource sets.
  • the SRS resource set may be alternated and thus provide SRS for each use case in a periodic manner.
  • the UE may be capable of providing a SRS transmission based on multiple SRS resource sets. In such cases, one or more combinations of use cases may be configured that are available for transmission using one SRS transmission resource.
  • first SRS resource set 305 for codebook uplink transmissions and second SRS resource set 315 for antenna switching may be an allowed combination that can be transmitted using the first SRS transmission resource 310.
  • Other combinations of use cases may be permitted or not permitted.
  • a non-codebook uplink and antenna switching use case combination may not be allowed.
  • the UE may transmit according to both use-cases of the first SRS resource set 305 and second SRS resource set 315, but if the first SRS transmission resource 310 has 2 or more ports, the UE may prioritize between the two use-cases. Additionally or alternatively, depending on periodicity of SRS resource sets, different solutions may be selected. For example, for two periodic SRS resource sets the UE may transmit the joint SRS resources according to both use-cases, but for two aperiodic SRS resource sets the UE can select which use case to prioritize.
  • alternating SRS transmissions may use different SRS resource sets, but if the periodicity meets or exceeds the threshold value the UE may transmit the joint SRS resources according to both use-cases.
  • FIG. 4 illustrates an example of a process flow 400 that supports SRS parameter determination techniques in accordance with aspects of the present disclosure.
  • process flow 400 may implement aspects of wireless communications system 100 or 200.
  • Process flow 400 may include UE 115-b and base station l05-b, which may be respective examples of a UE 115 and a base station 105 as described herein.
  • UE 115-b and base station l05-b may perform a connection establishment to establish communications.
  • connection establishment e.g., RRC connection establishment or RRC connection reconfiguration
  • base station l05-b configure two or more SRS resource sets, as indicated at 410.
  • Base station l05-b may transmit configuration information 415 that may indicate the SRS resource sets.
  • the configuration information may be transmitted as part of the connection establishment at 405.
  • the configuration information may include an indication of a priority to be applied by the UE 115-b in the event that two or more SRS resource sets use a same SRS transmission resource (e.g., configured through LPP).
  • the configuration information may include an indication of one or more combinations of SRS resource sets that may use a same SRS transmission resource (e.g., defined in RRC or defined in LPP).
  • the UE 115-b may provide the base station l05-b with an indication of the capability of the UE 115-b, and the base station l05-b may determine the configuration based at least in part on the EE 115-b capability.
  • EE 115-b may determine that multiple SRS resource sets correspond to a same SRS transmission resource. Such a determination may be made based on one or more parameters of the SRS resource sets that correspond to a same SRS transmission resource.
  • the EE 115-b may select a SRS resource set for an SRS transmission based on a prioritization that applies in such cases. The prioritization may be based on resource set identification, a prioritization of use cases associated with the SRS resource sets, or may be configured by the base station l05-b.
  • the EE 115-b may determine SRS parameters based on selected SRS resource set. The EE 115-b may transmit SRS 435 to the base station l05-b.
  • the base station l05-b may determine SRS resource set(s) associated with SRS 435 transmission. In some cases, the base station l05-b may determine the use case that the EE 115-b will select. In some cases, the use case may be determined based on a prioritization that is specified or that is provided by the base station l05-b in the
  • the base station l05-b may receive the SRS 435 and measure channel parameters. Based on the measured channel parameters, and the identified use case that the EE 115-b used for the SRS transmission, the base station l05-b may determine one or more parameters for subsequent communications with the EE 115-b.
  • FIG. 5 shows a block diagram 500 of a device 505 that supports SRS parameter determination techniques in accordance with aspects of the present disclosure.
  • the device 505 may be an example of aspects of a EE 115 as described herein.
  • the device 505 may include a receiver 510, a communications manager 515, and a transmitter 520.
  • the device 505 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).
  • the receiver 510 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to SRS parameter determination techniques, etc.).
  • information channels e.g., control channels, data channels, and information related to SRS parameter determination techniques, etc.
  • the receiver 510 may be an example of aspects of the transceiver 820 described with reference to FIG. 8.
  • the receiver 510 may utilize a single antenna or a set of antennas.
  • the communications manager 515 may receive configuration information for at least a first SRS resource set and a second SRS resource set, the first SRS resource set and the second SRS resource set each including two or more parameters for an associated SRS transmission, determine that the first SRS resource set and the second SRS resource set correspond to a same transmission resource, select the first SRS resource set for a first SRS communication using the transmission resource based on a prioritization associated with each of the first SRS resource set and the second SRS resource set, and transmit the first SRS communication based on one or more SRS transmission parameters associated with the first SRS resource set.
  • the communications manager 515 may be an example of aspects of the communications manager 810 described herein.
  • the communications manager 515 may be implemented in hardware, code (e.g., software or firmware) executed by a processor, or any combination thereof. If implemented in code executed by a processor, the functions of the communications manager 515, or its sub-components may be executed by a general-purpose processor, a DSP, an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in the present disclosure.
  • code e.g., software or firmware
  • ASIC application-specific integrated circuit
  • FPGA field-programmable gate array
  • the communications manager 515 may be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations by one or more physical components.
  • the communications manager 515, or its sub-components may be a separate and distinct component in accordance with various aspects of the present disclosure.
  • the communications manager 515, or its sub-components may be combined with one or more other hardware components, including but not limited to an input/output (I/O) component, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof in accordance with various aspects of the present disclosure.
  • I/O input/output
  • the transmitter 520 may transmit signals generated by other components of the device 505.
  • the transmitter 520 may be collocated with a receiver 510 in a transceiver module.
  • the transmitter 520 may be an example of aspects of the transceiver 820 described with reference to FIG. 8.
  • the transmitter 520 may utilize a single antenna or a set of antennas.
  • the communications manager 515 may be implemented as an integrated circuit or chipset for a mobile device modem, and the receiver 510 and transmitter 520 may be implemented as analog components (e.g., amplifiers, filters, antennas) coupled with the mobile device modem to enable wireless transmission and reception over one or more bands.
  • analog components e.g., amplifiers, filters, antennas
  • the communications manager 515 as described herein may be implemented to realize one or more potential advantages.
  • One implementation may allow the device 505 to receive configuration information for a first and second SRS resource set and select between the SRS resource sets based at least in part on a prioritization. This selection may allow for the first and second SRS resource sets to share a transmission resource which may increase reliability and reduce latency.
  • a processor of a UE 115 may increase reliability and decrease signaling overhead in the communications.
  • FIG. 6 shows a block diagram 600 of a device 605 that supports SRS parameter determination techniques in accordance with aspects of the present disclosure.
  • the device 605 may be an example of aspects of a device 505, or a UE 115 as described herein.
  • the device 605 may include a receiver 610, a communications manager 615, and a transmitter 635.
  • the device 605 may also include a processor. Each of these components may be in communication with one another (e.g., via one or more buses).
  • the receiver 610 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to SRS parameter determination techniques, etc.).
  • information channels e.g., control channels, data channels, and information related to SRS parameter determination techniques, etc.
  • the receiver 610 may be an example of aspects of the transceiver 820 described with reference to FIG. 8.
  • the receiver 610 may utilize a single antenna or a set of antennas.
  • the communications manager 615 may be an example of aspects of the communications manager 515 as described herein.
  • the communications manager 615 may include a configuration manager 620, a SRS resource set manager 625, and a SRS
  • the communications manager 615 may be an example of aspects of the communications manager 810 described herein.
  • the configuration manager 620 may receive configuration information for at least a first SRS resource set and a second SRS resource set, the first SRS resource set and the second SRS resource set each including two or more parameters for an associated SRS transmission.
  • the SRS resource set manager 625 may determine that the first SRS resource set and the second SRS resource set correspond to a same transmission resource and select the first SRS resource set for a first SRS communication using the transmission resource based on a prioritization associated with each of the first SRS resource set and the second SRS resource set.
  • the SRS transmission manager 630 may transmit the first SRS communication based on one or more SRS transmission parameters associated with the first SRS resource set.
  • the transmitter 635 may transmit signals generated by other components of the device 605.
  • the transmitter 635 may be collocated with a receiver 610 in a transceiver module.
  • the transmitter 635 may be an example of aspects of the transceiver 820 described with reference to FIG. 8.
  • the transmitter 635 may utilize a single antenna or a set of antennas.
  • the communications manager 615 may be implemented as an integrated circuit or chipset for a mobile device modem, and the receiver 610 and transmitter 635 may be implemented as analog components (e.g., amplifiers, filters, antennas) coupled with the mobile device modem to enable wireless transmission and reception over one or more bands.
  • analog components e.g., amplifiers, filters, antennas
  • the communications manager 615 as described herein may be implemented to realize one or more potential advantages.
  • One implementation may allow the device 605 to receive configuration information for a first and second SRS resource set and select between the SRS resource sets based at least in part on a prioritization. This selection may allow for the first and second SRS resource sets to share a transmission resource which may increase reliability and reduce latency.
  • a processor of a UE 115 may increase reliability and decrease signaling overhead in the communications.
  • FIG. 7 shows a block diagram 700 of a communications manager 705 that supports SRS parameter determination techniques in accordance with aspects of the present disclosure.
  • the communications manager 705 may be an example of aspects of a
  • the communications manager 705 may include a
  • Each of these modules may communicate, directly or indirectly, with one another (e.g., via one or more buses).
  • the configuration manager 710 may receive configuration information for at least a first SRS resource set and a second SRS resource set, the first SRS resource set and the second SRS resource set each including two or more parameters for an associated SRS transmission. In some cases, the configuration information further indicates a priority associated with each SRS resource set.
  • the prioritization component 725 may determine prioritization associated with the one or more SRS resource sets. In some cases, the prioritization is based on one or more of a resource set identification value of each of the first SRS resource set and the second SRS resource set, a configured resource set identification priority; or a priority based on a usage parameter of each of the first SRS resource set and the second SRS resource set. In some cases, the prioritization is a random prioritization. In some cases, the prioritization provides for alternating between the first SRS resource set and the second SRS resource set in consecutive SRS transmissions that are associated with both the first SRS resource set and the second SRS resource set.
  • the transmission resource is determined based on a symbol identification within a transmission slot and a transmission slot index and periodicity for semi-persistent or periodic SRS transmissions, or a trigger that initiates an aperiodic SRS transmission.
  • the first SRS resource set and the second SRS resource set are associated with a SRS use case, and include an associated usage parameter that indicates an uplink codebook-based channel quality determination, an uplink non-codebook precoding determination; an uplink analog beamforming determination, or an antenna switching procedure at the UE.
  • the communications manager 810 may receive configuration information for at least a first SRS resource set and a second SRS resource set, the first SRS resource set and the second SRS resource set each including two or more parameters for an associated SRS transmission, determine that the first SRS resource set and the second SRS resource set correspond to a same transmission resource, select the first SRS resource set for a first SRS communication using the transmission resource based on a prioritization associated with each of the first SRS resource set and the second SRS resource set, and transmit the first SRS communication based on one or more SRS transmission parameters associated with the first SRS resource set.
  • the I/O controller 815 may manage input and output signals for the device 805.
  • the I/O controller 815 may also manage peripherals not integrated into the device 805.
  • the I/O controller 815 may represent a physical connection or port to an external peripheral.
  • the I/O controller 815 may utilize an operating system such as iOS®, ANDROID®, MS-DOS®, MS-WINDOWS®, OS/2®, UNIX®, LINUX®, or another known operating system.
  • the I/O controller 815 may represent or interact with a modem, a keyboard, a mouse, a touchscreen, or a similar device.
  • the I/O controller 815 may be implemented as part of a processor.
  • a user may interact with the device 805 via the I/O controller 815 or via hardware components controlled by the I/O controller 815.
  • the wireless device may include a single antenna 825. However, in some cases the device may have more than one antenna 825, which may be capable of concurrently transmitting or receiving multiple wireless transmissions.
  • the memory 830 may include random-access memory (RAM) and read-only memory (ROM).
  • RAM random-access memory
  • ROM read-only memory
  • the memory 830 may store computer-readable, computer-executable code 835 including instructions that, when executed, cause the processor to perform various functions described herein.
  • the memory 830 may contain, among other things, a BIOS which may control basic hardware or software operation such as the interaction with peripheral components or devices.
  • the code 835 may include instructions to implement aspects of the present disclosure, including instructions to support wireless communications.
  • the code 835 may be stored in a non-transitory computer-readable medium such as system memory or other type of memory.
  • the code 835 may not be directly executable by the processor 840 but may cause a computer (e.g., when compiled and executed) to perform functions described herein.
  • FIG. 12 shows a diagram of a system 1200 including a device 1205 that supports SRS parameter determination techniques in accordance with aspects of the present disclosure.
  • the device 1205 may be an example of or include the components of device 905, device 1005, or a base station 105 as described herein.
  • the device 1205 may include components for bi-directional voice and data communications including components for transmitting and receiving communications, including a communications manager 1210, a network
  • the UE may receive configuration information for at least a first SRS resource set and a second SRS resource set, the first SRS resource set and the second SRS resource set each including two or more parameters for an associated SRS transmission.
  • the operations of 1305 may be performed according to the methods described herein. In some examples, aspects of the operations of 1305 may be performed by a configuration manager as described with reference to FIGs. 5 through 8.
  • the two or more parameters of each SRS resource set include one or more of a resource type associated with the SRS resource set or power control parameters associated with the SRS resource set.
  • the resource type indicates a periodic SRS configuration, a semi-persistent SRS
  • the base station may transmit configuration information to a UE for at least a first SRS resource set and a second SRS resource set, the first SRS resource set and the second SRS resource set each including two or more parameters for an associated SRS transmission.
  • the operations of 1505 may be performed according to the methods described herein. In some examples, aspects of the operations of 1505 may be performed by a configuration manager as described with reference to FIGs. 9 through 12.
  • the configuration information further includes one or more of a priority associated with each SRS resource set, or one or more combinations of parameters that indicate that a same SRS transmission may be used for both the first SRS resource set and the second SRS resource set.
  • GSM Global Communications
  • a macro cell generally covers a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs 115 with service
  • a femto cell may also cover a small geographic area (e.g., a home) and may provide restricted access by UEs 115 having an association with the femto cell (e.g., UEs 115 in a closed subscriber group (CSG), UEs 115 for users in the home, and the like).
  • An eNB for a macro cell may be referred to as a macro eNB.
  • An eNB for a small cell may be referred to as a small cell eNB, a pico eNB, a femto eNB, or a home eNB.
  • An eNB may support one or multiple (e.g., two, three, four, and the like) cells, and may also support communications using one or multiple component carriers.
  • Information and signals described herein may be represented using any of a variety of different technologies and techniques.
  • data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
  • the functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein can be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne des procédés, des systèmes et des dispositifs pour des communications sans fil, permettant de déterminer des paramètres de signal de référence de sondage (SRS) lorsque des ensembles de ressources SRS multiples sont configurés pour une même ressource de transmission de SRS. Un équipement utilisateur (UE) peut sélectionner un ensemble de ressources SRS pour une transmission de SRS en fonction d'une priorisation de différents ensembles de ressources SRS. Dans certains cas, différents ensembles de ressources SRS peuvent être associés à différents paramètres d'utilisation de SRS qui indiquent une situation d'utilisation pour le SRS, et l'UE peut transmettre un SRS conjoint pour au moins deux ensembles de ressources SRS pour des combinaisons prédéterminées de paramètres d'utilisation de SRS. Une station de base qui reçoit la transmission de SRS peut mesurer au moins un paramètre de canal du SRS et déterminer au moins un réglage pour des communications ultérieures avec l'UE.
PCT/US2019/052229 2018-10-05 2019-09-20 Techniques de détermination de paramètres de signal de référence de sondage Ceased WO2020072213A1 (fr)

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CN201980064255.5A CN112771812B (zh) 2018-10-05 2019-09-20 探测参考信号参数确定技术
EP19782850.2A EP3861660B1 (fr) 2018-10-05 2019-09-20 Techniques de determination des paramètres de signaux de type srs

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021109403A1 (fr) * 2020-04-11 2021-06-10 Zte Corporation Procédé et système pour un surdébit de signal de référence de sondage (srs) amélioré et schéma de réutilisation flexible
WO2022028490A1 (fr) * 2020-08-04 2022-02-10 Huizhou Tcl Cloud Internet Corporation Technology Co., Ltd. Sélection de ressources en liaison latérale sur la base d'une coordination d'équipement utilisateur
US12250702B2 (en) 2020-04-11 2025-03-11 Zte Corporation Method and system for improved sounding reference signal (SRS) overhead and flexible reuse scheme

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12088383B2 (en) * 2018-10-16 2024-09-10 Qualcomm Incorporated Uplink SRS with precoding
CN113259287B (zh) * 2020-02-13 2023-03-24 华为技术有限公司 一种通信方法及装置
CN114586424B (zh) 2020-09-30 2024-11-05 上海诺基亚贝尔股份有限公司 定位参考信号的优先级适配
CN114339997A (zh) * 2020-09-30 2022-04-12 中国移动通信有限公司研究院 资源配置方法、终端及基站
CN116097579B (zh) * 2020-10-21 2025-02-11 Oppo广东移动通信有限公司 无线通信的方法及设备
KR20230114308A (ko) * 2020-12-24 2023-08-01 지티이 코포레이션 업링크 송신에서의 전력 제어를 위한 시스템 및 방법
US11729757B2 (en) * 2021-01-05 2023-08-15 Qualcomm Incorporated Power level determination for transmission of reference signals
CN115412929A (zh) * 2021-05-10 2022-11-29 华为技术有限公司 Prs资源选择的方法和通信装置
EP4406166A4 (fr) * 2021-09-21 2025-05-07 Telefonaktiebolaget LM Ericsson (publ) Procédé et noeud de réseau d'accès radio destinés à l'attribution de ressources pour un signal de référence de sondage apériodique
CN114337967B (zh) * 2021-12-21 2023-09-19 哲库科技(北京)有限公司 系统级芯片、探测参考信号的处理方法及相关装置
EP4730905A2 (fr) * 2023-02-13 2026-04-22 QUALCOMM Incorporated Transmission de signal de reference de sondage (srs) de positionnement conditionnelle de ressources srs pre-configurees dans un etat de commande de ressources radio (rrc) non connecte
CN119728054A (zh) * 2023-09-27 2025-03-28 华为技术有限公司 通信方法和通信装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019158064A1 (fr) * 2018-02-14 2019-08-22 华为技术有限公司 Procédé et appareil d'émission de signal de référence de sondage
WO2019190236A1 (fr) * 2018-03-29 2019-10-03 엘지전자 주식회사 Procédé de transmission de signal de référence de sondage (srs) dans un système de communication sans fil et appareil associé

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2497218B1 (fr) * 2009-11-02 2019-09-04 Nokia Solutions and Networks Oy Configuration de signal de référence de sondage
EP3621390B1 (fr) * 2010-11-16 2024-10-09 Sun Patent Trust Dispositif de communication et procédé de commande de transmission srs
US9204434B2 (en) * 2012-03-19 2015-12-01 Qualcomm Incorporated Enhanced sounding reference signal (SRS) operation
WO2014109686A1 (fr) * 2013-01-14 2014-07-17 Telefonaktiebolaget L M Ericsson (Publ) Équipement utilisateur, nœud réseau et procédé correspondant pour transmettre des signaux de référence de sondage
US10129859B2 (en) * 2015-10-15 2018-11-13 Qualcomm Incorporated Uplink control channel for low latency communications
US10454646B2 (en) * 2015-11-14 2019-10-22 Qualcomm Incorporated Sounding reference signal transmissions in enhanced machine type communication
US10367616B2 (en) * 2016-04-04 2019-07-30 Qualcomm Incorporated Dynamic sounding reference signal scheduling
JP2019062503A (ja) * 2017-09-28 2019-04-18 シャープ株式会社 基地局装置、端末装置および通信方法
US11729782B2 (en) * 2018-06-11 2023-08-15 Apple Inc. Enhanced uplink beam management

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019158064A1 (fr) * 2018-02-14 2019-08-22 华为技术有限公司 Procédé et appareil d'émission de signal de référence de sondage
WO2019190236A1 (fr) * 2018-03-29 2019-10-03 엘지전자 주식회사 Procédé de transmission de signal de référence de sondage (srs) dans un système de communication sans fil et appareil associé

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
CATT: "Remaining issues on non-codebook based UL transmission", vol. RAN WG1, no. Vancouver, Canada; 20180122 - 20180126, 13 January 2018 (2018-01-13), XP051384717, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg%5Fran/WG1%5FRL1/TSGR1%5FAH/NR%5FAH%5F1801/Docs/> [retrieved on 20180113] *
CMCC: "Discussion on remaining issues on SRS", vol. RAN WG1, no. Chengdu, China; 20181008 - 20181012, 29 September 2018 (2018-09-29), XP051518432, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg%5Fran/WG1%5FRL1/TSGR1%5F94b/Docs/R1%2D1811030%2Ezip> [retrieved on 20180929] *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021109403A1 (fr) * 2020-04-11 2021-06-10 Zte Corporation Procédé et système pour un surdébit de signal de référence de sondage (srs) amélioré et schéma de réutilisation flexible
CN115398840A (zh) * 2020-04-11 2022-11-25 中兴通讯股份有限公司 用于改进的探测参考信号(srs)开销和灵活重用方案的方法和系统
US12250702B2 (en) 2020-04-11 2025-03-11 Zte Corporation Method and system for improved sounding reference signal (SRS) overhead and flexible reuse scheme
WO2022028490A1 (fr) * 2020-08-04 2022-02-10 Huizhou Tcl Cloud Internet Corporation Technology Co., Ltd. Sélection de ressources en liaison latérale sur la base d'une coordination d'équipement utilisateur
US12501454B2 (en) 2020-08-04 2025-12-16 Huizhou TCL Cloud Internet Corporation Tech Sidelink resource selection based on user equipment coordination

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EP3861660B1 (fr) 2024-03-13
CN112771812A (zh) 2021-05-07
CN112771812B (zh) 2024-08-16
EP3861660A1 (fr) 2021-08-11
US11140687B2 (en) 2021-10-05

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